Mixing-machine.



M. J. MAcLENNAN.

' MIXING MACHINE.

APPLICATION FILED MAY 26, 1913.

Patented May 25, 1915,

3 SHEETS-SHEET I.

WiTNEIEIfiEEI ATTBRNBYEJ M. J. MAcLENNAN.

MIXING MACHINE.

1,140,385 APPLICATION FILED MAY 26, 191.3. Patented May 25, 191-5 3SHEETSSHEET 3.

INVENTEIR m 5 i 5 MZ/MWZW fl fm 1 (LL- a (T M "DY i Q g was snaresPATENT OFFICE.

MALCOLM J'. MACLENNAN, OF BUFFALO, NEW YORK, ASSIGNOB. :TO ARTHUR V.BOGGS, 0F TORONTO, ONTARIO, CANADA.

MIXING-MACHINE.

1,]llO,385.

' Specification of Letters Patent.

Application filed may 26, 1913. Serial No. 769,830.

an animal food although the machine may be also used for mixing othermaterials.

It isthe object of this invention to produce a machine of this characterwhich is capable of mixingvarious ingredients in measured quantitiesthoroughly, expeditiously and economically.

In the accompanying drawings: Figure 1 is a perspective view of a mixingmachine embodying my invention. Fig. 2 is a vertical longitudinalsection of the same. Fig. 3 is a fragmentary horizontal section thereoftaken in line 3-3, Fig. 2. Fig. 4: is a fragmentary vertical transversesection taken in line 4i,.Fig. 2.

Similar characters of reference indicate corresponding parts throughoutthe several views.

l, 2, 3, Pand 5 represent a plurality of discharge or delivery spoutswhich have their lower ends arranged side by side in a transverse rowwhile the upper endsof the same are connected with supply bins orhoppersadapted to hold different kinds of grains, cereals or other materialeither in a 'ground, pulverized or other form which will permit the sameto flow freely from each bin downwardly through the companion dischargespout. 'The lower ends of these spouts are flush with each other and areadapted to be opened and closed by means which preferably comprise asingle trap door 6 normally extending horizontally across the lower endsof the several spouts so as to close the same. The door is preferablypivotally connected at its front edge with the lower front edges of thegroup of supply spouts by means of hinges 7 and the same is normallyheld in its elevated hori- Zontal or closed'position by means-of aweight 8 mounted on an arm 9 projecting 1 rearwardly from the rear edgeof the door.

The latter is also normally locked in its closed position by a lockingdevice, latch or catch which preferably comprises an upright spring arm10 secured at its upper end to the rear wall of the several dischargespouts and provided at its lower end with a bill, nose or shoulder 11adapted to engage with the underside of the trap door at the rear edgethereof. Upon pressing the lower end of this catch rearwardly the dooris released and will be depressed by the material within the spoutsresting upon the same and thereby permit this material to discharge fromthese spouts, but after the materialhas cleared the door and the latteris relieved of the pressure of the same the weight 8 again raises thedoor into its closed position.

During the closing movement of the door its rear edge engages with thebeveled or roundednose 11 of the locking latch and deflects the same andafter the door passes above this nose the latch again springs forwardlyinto engagement with the underside of the door and holds the samesecurely in its closed position.

12, 13:14, 15, 16 represent a plurality of cut-off gates, slides orvalves each of which has the form of a plate and is adapted to moveforwardly and backwardly across the lower part of one of the dischargespouts above the lower end thereof for the purpose of producingauneasuring chamber between this slide or cut-bif valve and the door andpermitting the quantity of material in this chamber to be dischargedfrom this spout upon opening the door while the material in the spoutabove the slide is held back and prevented from escaping. Means areprovided for alternately opening and closing the discharge door andcut-off slide of each spout at predetermined intervals so that measuredquantities of material are. discharged from each supply hopper throughits companion spout which are to be subsequently mixed with themeasuredquantities i of the materials, contained in the other supply hoppers forproducing a mixture containing certain proportions of the severalcereals,

grains or other materials which are being mixed. In order to permit ofvarying the capacity of the space between each of the out off slides andthe trap door and thereby vary the amount of measured material which issupplied at one time to the mixture wl. Zch

Patented May 25, 19115.

is to be produced this slide may be pushed forwardly and backwardlythrough one or the other of a vertical row of horizontal transverseslots 17 formed in the rear wall of the lower part of its companiondischarge'spout. When the slide is engaged with the lower slot-thequantity of material which is discharged atone time from the spout isless while upon engaging this slide with one of the upper slots thisquantity is increased accordingly.

up to clear the companion slot and permit the insertion therein of theslide, as indicated with reference to the lowermost slot in the spoutshown in Fig. 2, or the lid may be swung down across the outer end ofthis slot for closing the same, as shown with reference to the upperslots of the spout in Fig. When in its lowered or closed position eachlid may be locked in place by any suitable means, for instance as shownin Figs. 3 and 4, by means of two turn buttons 19 arranged on theadjacentvpart of the rear wall of the spout and adapted to be engagedwith the outer side of the lid.

It will be obvious from the foregoing that by engaging each of thecut-off slides with one or the other of its guide slots in the companionsupply spout that the amount of material discharged therefrom duringeach feeding operation may be regulated and that diiferent proportionsof the difierent materials discharged from the several spouts at eachoperation may be obtained in accordance with the character of themixture whichis desired and the purpose to which the same is intended.

Various means m. y be employed for movingthe several slides forwardlyand backwardly but those shown in the drawings, as an example, have beenfound suitable in practice and are constructed as follows: 20 representsa horizontally and longitudinally reciprocating valve operating headarranged in rear of the outlet portions of the spouts. i The rear endsof the several cut-off slides are connected wit this head so that theyare moved simultaneously and this connection is effected by means whichpermit each cut-off slide to be adjusted vertically in its com pamonspout in accordance with theamount of material which is to be dischargedduring each operation. The preferred means for thus effecting thisadjustment comprises a plurality of upright slots 21 formed on the valvehead and each of which is adapted to receive a clamping bolt 22 arrangedon the rear end of one of the slides. By loosening horizontal gear rack23 which is mounted to slide in a guideway 24 formed on the adj acentpart of the main frame and this gear rack meshes with a gear wheel 25mounted on a drivenshaft 26 which is journaled in hearings on theadjacent part of the frame. This shaft is turned alternately in oppositedirections for causing the cut-off valves or slides to be reciprocated,the means for this purpose shown in the drawings comprising a drivingshaft 27 journaled in suitable bearings belowthe gear rack and wheel andturning continuously in the same direction.

28, 29 represent two driving pulleys mounted loosely on the drivingshaft and 30, 31 two driven pulleys mounted on opposite ends of thedriven shaft 26.

32 represents a crossed belt passing around the pair of companionpulleys 28, 30 on the driving and driven shafts, and 33 a'straight beltpassing around the pair of companion pulleys 29, 31 on said driving anddriven shafts, respectively. By connecting either one or the other ofthese driving pulleys with the driving shaft, the driven shaft will becaused to turn either in one direction or the other. The connection anddisconnection of each of these driving pulleys with the driving shaftmay be effected by any suitable means, those shown in the drawings beingpreferred and comprising a coupling or clutch sleeve 31 splined on thedriving shaft between the driving pulleys 28, 29 so as to be compelledto turn with this shaft but capable of sliding lengthwise thereon andcoupling or clutch jaws or teeth 35, 36 formed on opposite ends of thecoupling sleeve and adapted to engage respectively with clutch teeth orcoupling jaws 37, 38 on the adjacent ends of the corresponding driv: ingpulleys 28, 29. While the coupling sleeve is in its central position itscoupling jaws are out of engagement from the coupling jaws of bothdriving pulleys at which time the cut-off slides are at rest but uponshifting the coupling sleeve lengthwise so that the jaws at one or theother of its ends engage with the clutch jaws of one or the ed with thecoupling sleeve so that the latter is compelled to slide on the drivingshaft other of the driving pulleys the cut-elf slides incense uponrocking the clutch lever but the coupling sleeve is free to turn withthe driving phaft independently of the clutch shifting ever.

The rocking movement of the clutch lever is produced by means whichcomprise a cam lever l0 pivoted on a convenient stationary part andhaving one of its arms engaging with a rotatable cam l1 while its otherarm is connected by a link 42 with the clutch lever 39. The cam ll ismounted on one end of a shaft 3 which is provided with a worm wheel 1L4:engaged by a worm 15 mounted on a shaft 4C6 turning constantly in thesame direction. The cam a1 is so constructed that it shifts the clutchlever 39 in a manner to cause the same to engage the coupling sleevewith one of the driving pulleys and cause the several cut-off slides tomake a complete stroke in one direction, then shift the coupling sleeveout of engagement from the driving pulley which has just been operatedand hold the same in its central neutral position a predetermined lengthof time then engage the coupling sleeve with the other driving pulleyfor causing the several cutofl' slides to be moved a complete stroke inthe opposite direction, and then move the coupling sleeve again into itscentral or neutral position to permit the cut-01f slides to remain atrest for a predetermined length of time at the end of the last mentionedstroke. 47 represents a stationary funnel arranged below the outlets ofthe several delivery spouts and adapted to receive the materialdischarged from the latter.

Below the funnels is arranged a mixing box, tub, trough or chamber 48which has its bottom and sides closed and has an open top which isnormally arranged vertically in line with the outlet at the lower end ofthe funnel for receiving the material from the latter. This mixing boxcontains a rotatable beater 49 whereby the materials discharged into thebox ere thoroughly, mixed with each other. This beater may be of anysuitable and well known construction and is preferably mounted upon ahorizontal shaft 50 extending through the lower part of the mixingtrough. Rotary motion is imparted to the beater shaft 50 by a gear wheel'51 secured to one end thereof and meshing with a pinion 52 on a countershaft 53 and the last mentioned shaft may be turned by means of a pulley54 secured thereto and a driving belt 55 passing around this pulley andreceiving motion from a prime mover of any suitable character such as' agas engine or steam operated motor.

TVhen the batch of material in the mixing box has been sufficientlycommingled so that the different ingredients are evenly and uniformlydistributed throughout the entire 5 mass this box is tipped to one sideso that the contents thereof are discharged therefrom. F or this purposethis mixing box is rotatably mounted by journaling the same on thebeater shaft so that the mixing box may be either turned upwardly andrearwardly into its operative upright position belowthe fIlIIHGL HSshown in F igs. 1 and 2, or this box may be tipped forwardly anddownwardly so that its contents are discharged into a delivery chute 56which is arranged in front of the mixing box and whereby the mixedmaterial is carried to any suitable place for packing the same in bags,barrels or boxes or disposing of the same otherwise.

Means are provided for periodically and automatically tipping the mixingbox, then righting the same and then holding the same in an uprightposition preparatory to receiving a new batch of material from thefunnel and mixing the same. The means for this purpose which are shownin the drawings are constructed as follows: 70 rep- 5S, thencerearwai-dly and upwardly around an intermediate guide roller 59 andthence forwardly and connected at itsrear end' yieldingly to the rearside of the mixing box by meansof an interposed spring 60 form ingpractically a part of this tipping line or cable. Upon turning the drumin one direction a pull is produced on that end of the'line or cablewhich is attached to the front side thereof causing the same to be,tipped forwardly into a discharging position while-the other end of thecable is paid out from the drum to permit the last mentioned end tofollow the forward tipping movement of the mixing box, while uponturning the drum in the opposite direction a. pull is produced on therear end of the tippin cable so as to turn the box into an uprightposition while the opposite or front end of the tipping cable is paidout in order of 2112011111361 shaft 62 provided at one end with a gearpinion 63 which meshes with the gear wheel 51 while its opposite end 13provided with a pulley 65 which receives a belt 66 passing around a.pulley 67 at one end of the driving shaft 61. I Motion is transmittedfrom the driving shaft 61 to shafts. Motion is also transmitted from thedriving shaft- 61, to the worm shaft"- 46-by means of a sprocket chain'71 passing around sprocket wheels '72, 73 secured respectively thedriving shaft 27 by means of a belt 64 passing around pulleys 68, 69 onthese 'to these shafts.

74, 75 represent two driving pulleys secured to the driving shaft 61the. first of which receives a straight belt 76 passing on. At itsopposite ends the clutch sleeve 20 81-is provided with clutch jaws orcoupling- 'teeth 82, 83 which are adapted to engage respectively withclutch teeth or coupling jaws 84, 85 on the opposing ends of the drivingpulleys 74, 75. When the clutch sleeve 81 is in its central position itis out of engagement with both of the pulleys 74, 75 but when thisclutch sleeve is shifted,

lengthwiseto one end of its stroke the clutch jaws at one end thereofengage with one of the driving pulleys 74, 75 and cause the drum to beturned in the direction for tipping the mixing box while upon shiftingthe coupling sleeve so that it is connected with the other drivingpulley the drum will be turned in the direction for moving the mixingbox into an upright position. This longitudinal movement of the clutchsleeve is effected by means of a clutch lever 86 connected with thesleeve so as not to interfere with the turning movement of the .sleevebut compel the same to move lengthwise on the driving shaft upon rockingthis lever, a cam 87 secured to the cam shaft 43, and an intermediatecam lever 88 having one of its arms engaging the cam 87 while its otherarm is connected by means of a link 89 with the clutch lever86, as shownin Figs. 1 and 2. The cam 87 is so constructed that it holds the clutchsleeve 81 in its neutral or inoperative position and out of engagementfrom both driving pulleys 74, 75 a suflicient length of time to hold themixin box in an upright position while the material to be mixed isdischarged into the same by the funnel and the material is being mixedthen the clutch sleeve is coupled with one of the respective drivingpulleys for tipping the mixing box into a dumping position and then theclutch sleeve is engaged with the other driving pulley for againreturning the mixing box into an upright position and then the clutchsleeve is retained in its neutral position for again holding the mixingbox at rest while receiving another batch of material and mixing thesame.

In order to-preventthe mixing box when tipped" for-1 discharging thesame from strikingablow or unduly straining the tipping box the line 120and springs 121 are doubled and slackened, as shown in Fig. 2.,

and during the upward movement of the Means are provided forautomatically opening the trap door 6 of the delivery spouts during thelast portion of the return or rearward movement of the mixing box fordischarging themeasur'ed quantities of material from the several spoutsinto the mixing box preparatory to mixing the same.

" The preferred means for accomplishing this purpose which are shown inthe drawings comprise a trip lever 90 pivoted on the lower part of therear wall ofthe funnel, a pulling cord or line 91 connected at its lowerend with the upper arm of the trip lever and at its upper end with thelatch 10 of the trap door while its intermediate ,part passes aroundguide rollers 92 mounted on the funnel, and a trip finger 93 pivoted onthe lower arm of the tri lever so as to be capable of swinging orwardlythereon but limited as to its rearward movement relatively thereto bymeans of a stop 94 ar-.

ranged on the finger and engaging with the rear side of the trip lever.During the forward dumping movement of the mixing box the upper edgeofits rear wall engages with the trip finger and deflects the sameforwardly without disturbing the trip lever so that the latch 10continues to hold the trap door 6 in its closed position. During thelast part of the. return or backward movement of the mixing box theupper edge of its rear wall upon engaging the trip finger 93, which isnow rigid relative to the .trip lever, causes this lever to be turned ina direction which will produce a downward pull on the line 91 andthereby disengage the latch 10 from the trap door 6. At this time theseveral cut-off slides or valves 12-16 are moved inwardly orforwardlyand bridge the spaces within these spouts at different distances fromthe trap door, so that only the material in these spouts below thecut-off valve discharges downwardly therefrom into the funnel theinstant the trap door is released and is directed by this funnel intothe mixing box. The depression of the trap door for releasing thematerial from the discharge a spouts is effected solely by the weight ofthematerial resting upon this the compound or mixture intense door butafter this material has escaped from the spouts the trap door isautomat1- cally raised into its closed position by the weight 8 and thedoor is also looked in its closed position by snapping-past the latch 10and becoming interlocked with the shoulder 11 of the latter.

At times it is desirable to add a liquid to such as molasses for thepurpose of sweetening the same, this being particularly desirable in acase of animal foods. For the purpose of introducing such a liquidperiodically in measured quantities into the mixing box with each batchof the granular materials of the mixture, automatic means are providedwhich are preferably constructed as follows? Extending from a suitablesource or" supply into the funnel is a pipe orconduit comprising asupply section connected with thesupply reservoir, a delivery section 96pro jecting downwardly into the tunnel and a measuring section 97interposed between the supply and delivery sections. Between the supplyand measuring sections is arranged an inlet valve 98 wherebycommunication between these sections may be established or cut 03. llhisvalve may be of any suitable construction that shown in the drawings isprovided with a rotatable plug 99 having a rock arm 100 on the exteriorof the casing. An outlet valve 101 is interposed between the measuringsection and the delivery .sec- 'tion for the purpose of connecting ordisconnecting these sections. The last mentioned valve also is providedwith a rotatable plug 102 having a rock arm 103 on the exterior of thevalve casing but projecting in a direction opposite to the arm of theinlet valve. A connection between the liquid inlet and liquid outletvalves 98,101 is provided which is so constructed that upon opening oneof these valves the other will be closed, and vice versa, therebyproviding for a measured and step by step how of the liquid from the supply reservoir into the mixing box and preventing a continuous flow ofthis'material. The preferred means for this purpose shown in thedrawings comprise an intermediate rock lever 104; pivoted on themeasuring section of the liquid pipe or other convenient support andhaving one of its arms connected by a link 105 with the arm of the inletvalve and its other arm connectedaby a linlr=106 with the arm of theoutlet valve. This intermediate rock lever is operated automatically atpredetermined intervals and prefer ably in harmony with the operation ofthe cut-0d valves by means of alink- IO'Z connecting the head of thecut-0d valves with one arm of the intermediate rock lever, as shown inFig. 3.

While the cut-oil valves are withdrawn from the spouts and the materialin the several spouts tall by gravity so as to fill the spouts duerto.space'helow these valves and the trap doors discharged from the severalspouts into the mixing box so that these several ingredients may bethoroughly mixed before being packed. During the forward movement ofthecut-ofi valves the inlet valve is opened and the outlet valve isclosed, thereby causing-the measuring section of the liquid pipe to beagain filled with liquid. As the cut-ofi' valves are again withdrawn theoutlet valve is opened and the inlet valve closed to permit the chargeof liquid in'the measuring section to fiowto the mixing box, thisoperation being repeated for each batch of materials which is beingmixed. ilnorder to prevent any air from being trapped in the measuringsection of the liquid conduit a vent pipe 108 is preferably connectedwith the inlet valve and led upwardly to a point above the liquid supplyreservoir so that any air contained in this pipe may escape to theatmosphere without, however, permitting theescape of any liquid Eiderany reason the trap doorti should not be closed iediately afterdischarging the granular material from the several binding of itshinges,-the-tailme of: its weight or the presence of some obstruction,clnsing'this trap door-at the .sametime that the cut-ed valves or slidesare withdrawn rearwardly t'rornthe spouts. The preferred means for thispurpose shown in the draw' ingsfor this purpose comprise a closing arm109 guided to move horizontally in a way 110 formed on a-bracket 111secured to vthe spouts and connected at its rear .end with the cut-oldvalve head and provided at its front end-with a lifting nose orfinger-.112 adaptedto engage with the underside of the trap door. As thecut-oh valves move forwardly the from underneath the trap door so as topermit the latterto drop and discharge the contents of the spoutsbelowthecut-oil valves the instant the latch 10 is released and duringthe backward movement ot the cut-.ofi valve'the lilting fingeragainmoves rearwardly underneath the trap door and lifts the latter intits closedposition, as shown in'Figs. 1 and 3. lltfollows from thisconstruction that itthe trap door is not closed by its weight 8 afterbeing relieved of the pressure of the material discharging from thespouts below the cut ofi valves the lifting finger 112 during therearward movement of the cut-.ofi valves will positivelylift the trapdoor into its closedposition, thereby prelifting linger movesrearwardly;

means are provided for positively venting the trap door. from remainingopen While the cut-off valves' are withdrawn from the delivery spoutswhich otherwise would Figs. 1, 2, and 3, granular material from vtheseveral bins will flow downwardly through the several spouts untilarrested by the trap door, and the liquid in the measuring section ofthe liquid conduit will flow into the mixing box for admixture with thegranular materials previously delivered into the box. After a batch ofgranular material and liquid has been delivered into the mixing box thelatter is held for a suitable length of. time in an upright position andthe ingredients therein are agitated by the beater until they arethoroughly and uniformly commingled. Thereafter the mixing box is tippedforwardly so as to discharge the .mixed batch of material therefrom andthen this box is again returned to its upright position. 1

After the material from the bins has flowed downwardly iii the spouts tothe trap door the several cut-off valves are moved forwardly so as tobridge the spouts at suitable distances above the tra door, this forwardmovement of the cut-01f valves being efi'ected at any suitable timeafter the lower parts of the spouts have been filled but before themixing box has returned from its" dumping position into its receivingposition. During the last part of the return movement of the mixing boxthe trap door is released by the withdrawal of the latch 10 through themedium of the mechanism which is operated upon by the mixing box,thereby permitting the weight of the material resting upon the trap doorto depress the latter and permit this material to flow by gravity out ofthe spouts and through the funnel into the mixing box. Immediatelythereafter the trap door is closed by its weight and then the.

cut-off valves are moved rearwardly out of the spouts, and the trap dooris also positively closed by the lifting finger 112 if the weight 8 hasfailed to accomplish its ur-.

pose. During the forward movement 0 the cut-oil valves the outlet valve101 is closed and the inlet valve 98 is opened so as to permit offilling the measuring section of the liquid conduit with molasses orother liquid.

which is being supplied but during the backward movement of the cut-offvalves I which occurs immediately after the granular -materials whichenter into the mixture-of the animal food or other compound which is tobe produced and that all that is necessary is to keep the supply binsfilled with granular material and the reservoir filled with the desiredkind of liquid and to take care of the mixed material, asthe same isdischarged from the mixing box. This machine is very eficient inoperation and requires the expenditure of but little power and insuresthe production of a. mixture of animal food or the like in which theingredients are thoroughlyanduniformly distributed throughout the entiremass, there 'by rendering the same particularly suitable for mixingmaterials in which this condition is a desirable feature.

ll claim as my invention:

1. A mixing machine comprising a spout, a door for closing the lower endof the spout, and a valve adated to be moved across said spout atdifierent places above said door. 1 1

2. A mixing machine comprising a spout provided with a vertical row ofslots in its side, a door for closing the lower end of said spout, and avalve adapted to be moved through one or the other of said slots andacross said spout.

3. A mixing machine comprising a spout provided with a. vertical row ofslots in its side, a door for closing the lower end of said spout, avalve adapted to be moved through I valve comprising lids pivoted onsaid spout and 'a turn button for holding each lid across its companionslot. .5. A mixing machine comprising a-spout,

a door for closing .thelower end of the spout, a valve adapted to bemoved across said spout at different places above said door, areciprocating head, and means for adjustably securing said valve to saidhead.

nausea 6'. it mixing machine comprising a spout, a door for closing thelower end of the spout, a valve adapted to be moved across said spout atdifierent places above said door, a reciprocating head, and means for,

and an oscillating gear wheel meshing with saidrack. i

8. A mxing machine comprislng a spout,

a door for closing the lower end of the spout,

a valve adapted to be moved across said spout at difi'erent placesalcove said door and means for shifting said valve comprising a ear rackconnected with said valve, a gear wheel meshing with said rack, andmeans for oscillating said gear wheel comprising two driven pulleysoperatively connected said gear wheel, two driving pulleys, a straightbelt passing aroundone pair of said driving and driven pulleys and acrossed belt passed around the other pair of said driving and drivenpulleys 9.; A mixing machine comprising a spout, a door for closing thelower end of the spout, a valve adapted to I he moved across said spoutat diiderent places above said door and means tor shifting said valvecomprising a gear rack connected with said valve; a gear wheel meshingwith said rack, and means for oscillating said gear wheel comprising twodriven pulleys operatively connected witi said gear wheel, two,drivingxpulleys, a straight belt passing around one pair of said drivingand driven pulleys, a crossed belt passed around the other pair of saiddriving and driven pulleys, a driving shaft upon which said drivingpulleys are mounted loosely, and a coupling sleeve splined on said shaftand adapted to couple either one or the other of said driving pulleyswith said driving shaft,

10. A; mixing machine comprising a spent,

a door for closing the lower end of the spout, a valve adapted to bemoved across said spout at difierent places above said door and meansfor shifting said valve comprising a gear rack connected with saidvalve, a gear wheel meshing with said rack, and means for oscillatingsaid gear wheel comprising two driven pulleys operatively connected withsaid gear wheel, two driving pulleys, a straight belt passing around onepair of crossed belt passed around the other pair of said driving anddriven-pulleys, a driving shaft upon which said driving pulleys are saiddriving and driven pulleys, a

mounted loosely, a coupling sleeve splined on-said shaft and adapted tocouple either one or the other of said driving pulleys with said drivingshaft and means for shifting said coupling sleeve lengthwise of saidshaft.

11. A mixing machine comprising a spout, a door for closing the lowerendof the spout, a valve adapted to be moved across said spout atdifi'erent places above said door and means for shifting said valvecomprising a gear rack connected with said valve, a gear wheel meshingwith said rack, and means for oscillating said gear wheel comprising twodriven pulleys operatively connected with said gear wheel, two drivingpulleys, a straight belt passing around one pair of said driving anddriven pulleys, a crossed belt passed around the other pair of saiddriving and driven pulleys, a driving shaft upon which said drivingpulleys are mounted loosely, a coupling" sleeve splined on said shaftand adapted to couple either one or the other of said driving pulleyswith said driving shaft and means for shifting said coupling sleevelengthwise of said shaft comprising a clutch lever operatively connectedwith said sleeve, a rotatable cam, and a cam lever engaging said cam andconnected with said clutch lever.

12. A mixing machine comprising a spout, a door for closing the lowerend of the spout, aavalve adapted to be moved across said spout atdifi'erent places above said door and means for shifting said valvecomprising a gear. rack connected with said valve, a gear wheel meshingwith said rack, and means for oscillating, said gear wheel com prisingtwo driven pulleys operatively con-- nected with said gear wheel, two''driving pulleys, a straight belt passing around one pair of saiddriving and driven pulleys, a crossed belt passed around the other pairof said driving and driven pulleys, a driving shaft upon which saiddriving pulleys are mounted loosely, a coupling sleeve splined on saidshaft and adapted to couple either one or the other of said drivingpulleys with said driving shaft and means-for shifting said couplingsleeve lengthwise of said shaft comprising a clutch lever operativelycon nected with said sleeve, a rotatable cam, a cam lever engaging saidcam and connected with said clutch lever, a worm wheel connected withsaid cam, and a rotatable worm meshing with said worm wheel.

13. A mixing machine comprising a plu rality of spouts arranged side byside, means for opening and closing the lower ends of said spouts, andvalves for shutting 05 said spouts at diflerent distances from theopening and closing means at the lower ends thereoi? it. A mixingmachine comprising a plurality of spouts arranged side by side, meansfor closing the lower ends of said spouts,

valves for shutting off said spouts at differof said valves toward andfrom the closures prising a drum,

of the respective spout independent of the valves of the other spouts.

15. A mixing machine comprising a mixing box, means for tipping saidbox, and

' means for cushioning the movements of said box while tipping the same.

16. A mixing machine comprising a plurality of spouts adapted to deliverdifferent granular material, a vertically rocking mixing box adapted toreceive the material from said spouts and means for rocking said box,

comprising a drum, a tipping line passing around said drum and connectedat its opposite ends with said box on opposite sides of its axis, twodriven pulleys connected with said drum, a driving shaft, two driv-' ingpulleys mounted loosely on said driving shaft, a straightbelt passingaround a pair of said driving and driven pulleys, a crossed belt passingdriving and driven pulleys, and means for connecting either one orthe'other of said driving pulleys with said driving shaft.

17. A mixing machine comprising a plurality of spouts adapted to deliverdifferent granular material, a vertically rocking box adapted to receivethe material from said spouts and means for rocking said box comatipping line passing around said drum and connected at its opposite endswith said box on opposite sides of its. axis, two driven pulleysconnected with said'drum, a driving shaft, two driving pulleys mountedloosely on said driving shaft, a straight belt passing around a pair ofsaid driving and driven pulleys, a crossed belt passing around the otherpair of; said driving and driven pulleys, and means for connectingeither one or the other of said driving pulleys withsaid driving shaftcomprising a coupling sleeve splined on said driving shaft and adaptedto be connected witheither of said driving pulleys, a clutch leverconnected with said sleeve, a rotatable cam, and a cam lever engagingsaid cam and connected with said clutch lever.

18. A mixing machine comprising a rocking mixing box, and means forrocking said box comprising a drum, around said drum and connected atone end with one side of said box, and a spring connecting the other endof said line with the other side of said box.

19. A for delivering granular material, a door hinged at one edge tosaid spout, a latch for engaging the other edge of-the door and holdingthe same in a closed position, 'a

. rocking mixing around the other pair of said i a line passing mixingmachine comprising a spout said door as the box moves into a positionfor receiving granular material therefrom.

20. A mixing machine comprising a spout for. delivering granularmaterial, a door hinged at one edge to said spout, a latch for engagingthe other edge of the door and holding the, same in a closed position, abox adapted to receive the granular material from said spout and movableinto a discharging or receiving position, and means for releasing saidlatch from said door as the box moves into a position for receivinggranular material therefrom comprising a trip lever, a line connectingone arm of said trip lever with said latch, and a trip finger adapted tobe engaged by said box and pivotally mounted on the other arm of saidlever so as to befree to turn forward but .held against turningbackwardly relatively thereto.

21. A mixing machine comprising a mixing box, a liquid conduit having asupply section, a delivery section, and a measuring section interposedbetween said supply and delivery sections, an inlet valve arrangedbetween said supply and measuring sections, an outlet valve arrangedbetween said measuring and delivery sections, and means for causing oneof said valves to open and the other to close and viceversa, comprisingrock arms connected with the plugs of said valves and an intermediatelever having one of its arms connected with one of said valve arms andits other arm connected with the other valve arm. I

22. A mixing machine comprising a spout for delivering granularmaterial, a box receiving the material from said spout, a cutoff valvefor controlling the passage of material throu h said spout, a liquidsupply pipe adapte to deliver liquid simultaneously into said box, avalve in said pipe, and means for causing said valves to operate inunison.

23. Amixing machine comprisingas'pout, i

a door pivoted to the outlet of said spout, a cut-off valve movable intoand out of said spout above said door, and a closing arm moving withsaid cut-ofl' valve and having a finger adapted during the openingmovement of said cut-off door and close the same.

-Witness my hand this 22nd day of May, 1913. MALCOLM J. MAoLEN NAN.

YVitnesses:v P

ARTHUR V. Boees; THEO. L. Porn valve to engage said i

